I do like your greenhouse, We want to build a green house as well but the town we live in would never let us make one like this because they have really strict building codes. If it is correct, it means that the lean away greenhouse is more useful than I thought. Light is what plants live on. Also, the angles work better to bounce the light away around midday in summer than a lean to.
There is absolutely nothing wrong with getting north eastern light in the morning when the greenhouse is cool anyway. Also in the winter when the angle of the sun is lower you are reducing the light because of the angle of the glass and positioning of glazing bars. I bet the shower door glass that you cant see through, the like, textured glass would be excellent because of the way it would refract the lighting coming in. great idea!
As an odd side note - buying cheap showers and their doors can be a great source of large glass sheets that are well toughened, on a project I'm building they've come in very handy, had some sitting in storage for no apparent reason... Any decent physics or computer guy could do the scene file, it would look great on your resume and it would be used all over the world for greenhouse, and garden design. First of all the degrees of sunlight and the amount of daylight/nighttime hours does not tally.
There are also greenhouses beside fences where you need to crouch to get into the darn thing! On google images, there are thousands of lean to greenhouse which lose out in the summer. Pie shaped lot so to have usable space beside it, I had to have the side of the greenhouse at an angle.
This is largely irrelevant because I do not have a "control" greenhouse that is lean to to compare it to. Bur never the less. Just a few screenshots from a little camera movie to show how well it is growing plants. Because it leans away, the sun hits the plants over the fence rather well from the north east and northwest.
The only thing I bought for this greenhouse was the silicone to put the glass in frames and the screws to hold the wood together. Add Mill Poly twin-walled 6 x 6ft Greenhouse to Trolley. Add Mill Poly twin-walled 6 x 10ft Greenhouse to Trolley.
Add Silver Aluminium Twin-walled Greenhouse - 6 x 8ft to Trolley. Add Silver Aluminium Twin-walled Greenhouse - 6 x 4ft to Trolley. Yes thank you it past my expectations it was easy to erect I am 75 yrs old and I put it up with gardman greenhouse out help instruction was easy to follow so I am more than Happy with it also send photos and a review to Norfolk Greenhouses so thank you yes and since up it has stood two storms over the last two week ends so pleased with my purchase.
"An excellent alternative to a full size glass greenhouse." - by Elaine. With the greenhouse nearly completed, it was time to build the workbenches inside. Instead of making vents on the roof (which might leak), I framed in two openings up high on each end of the structure and installed shutters above the door on the windward side and an exhaust fan on the lee side.
After attaching a grid of pre-stained 1×3-inch pine boards spaced 30 inches apart across the top of the rafters and 24 inches apart across the vertical framing, I covered the whole structure with eighteen 2×8-foot polycarbonate corrugated transparent panels from Home Depot. I found an unusual door at the local Builder's Bargain Center†for $89 and it was perfect for a greenhouse. Using kiln-dried 2×4 studs at 2-foot centers, I framed the front wall, then the side walls, including a 30½-inch-wide door opening (with a 4×4 header) on one end of the structure.
Once they dry and shrink, there'll be 3/8-inch gaps between them to let water and stray dirt fall through as we work and irrigate inside the greenhouse. It has been begging for a greenhouse since 2012 when we finished it. (See the Building Eric's House†series printed in Backwoods Home Magazine between 2009-2012.) Your first ripe tomato will cost $800, but it's worth it  your greenhouse will allow 365 days of gardening a year.
Tammy has been using, selling and installing greenhouses since 1993. Most greenhouse kits have a roof pitch of 4 - 5 on 12. Some will have an even higher pitch. Some manufacturers are able to reduce the roof pitch of the greenhouse so that you do not need as much attaching height.
A Northern exposure is not a desirable location, but as with any other greenhouse you can add items like supplemental lighting. Of course you may need a building permit for a freestanding greenhouse as well. Depending on your area and the size of the lean to, you may need a building permit for this type of structure.
The freeze thaw cycle will cause the ground to heave and may break some of your greenhouse glass during this cycle. You will need to build a better foundation for the greenhouse as it is becoming part of your structure.